Steam hydraulic intensifier



T. W. HAND. STEAM HYDRAULIC INTENSIFIER.

APPLICATION FILED AUG. 20, 1917.

M m 1 L E L w m M 3 w k n m M \P A m 7 Q AA 1 M m 1 2 \RRN & 5 WU 1 2 WM H T. W. HAND.

STEAM HYDRAULIC INTENSIFIER.

AP LICATION FILED AUG 20, I917.

Patented July 13, 1920.

3 SHEETSSHEET 2- INYENTOR 74mm, 410%: 7 6%.? 71 ZZ; fiwg 5 T. W. HAND. STEAM HYDRAULIC INTENSIFIER.

APPLICATION FILED AUGIIZO I917.

Patented July 13, 1920.

3 SHEETS-SHEET 3- INVENTQR 7%M 1 W UNITED STAT LP 'l'ET UFlCE.

THOMAS WILTON HAND, or srIErEIELn, ENGLAND, ASSIGZt-IOR re navr :enorrrnns LIMITED, or SHEFFIELD, ENGLAND.

STEAM HYDRAULIC INTENSIFIER.

Specification of Letters Patent. P t g July 7 1920.

Application filed August 20, 1917. Serial No. 187,271.

ing at Sheffield, in the county of York, England, have invented new and useful lmprovements in Steam Hydraulic Intensifiers, of which the following is a specification.

This invention relates to steam hydraulic intensifiers such as are used, for example, in connection with hydraulic forging presses, shears, and the like, and wherein the steam cylinder is mounted above and in vertical axial alinement with the hydraulic cylinder and ram. The present invention is directed i more particularly to providing improvements in the construction set forth in the specification of my application for Letters Patent Serial No. 187,270, filed Aug. 20, 1917, according to which the movable member (whether ram or cylinder) of the hydraulic portion of the intensifier is caused, in performing its movement of extension relatively to the stationary member (cylinder 01' ram), to be projected beneath said stationary member, motion being transmitted between the steam piston and said movable member by means of rods disposed alongside of and parallel to the vertical axis of the intensifier, and one object of the arrangement being to prevent transmission of heat from the steam portion to the hydraulic portion of the intensifier and thus to obviate the disadvantages due to heating of the hydraulic packing between the ram and its cylinder.

The present invention is directed to providing a construction whereby the better to insure the attainment of the object just mentioned; and for this purpose, according to the invention, the stationary member, whether cylinder or ram, of the hydraulic portion of the intensifier is attached'to the lower member of a stool which forms a support for the steam cylinder and which may be integral with the bottom cover thereof, the stool being in the form of an open frame (such as c. g. a truncated conical irustum having an apertured wall) to the Interior of which the atmosphere has free access. in consequence of this arrangement the point of attachment between the stool and the stationary member. {of the hydraulic portion of the intensifier is so situated as to necessitate the heat, which passes by conduction through the metal of the stool from the steam cylinder to said stationary member, traversin a long course which is not only of large alea both superficial and cross-sectional butis also thoroughly exposed to the atmosphere both outside and inside the stool. In the accompanying drawings, Figure 1 1S 2t sectional elevation showing an example or one form of intensifier, wherein the stationary member of the hydraulic portion of th e intenslfier is the hydraulic cylinder, part it the height or the ngure being broken out. rug. 2 is a part simllar elevation viewed at right angles to big. 1. l ig. 3 is a sectional elevation showing another form of intensifier, wherein the stationary member of the hydraulic portion of the intensifier is the hydraulic ram, parts of the height being broken out. Fig. 1 is a part similar elevatron viewed at right angles to Fig. 3.

In both of the examples illustrated, the cylinder 11 of the steam motor which iorins a part of the intensifier is mounted upon a stool 12 which rests uponthe foundation 13, the bottom cover 14 of the-steam cylinder being integral with the stool, which latter is shown as a single casting having formed in one with it the passage 15 for the supply and exhaust of steam to and from the cylinder 11.

in the form of: apparatus illustrated in Figs. 1 and'2, wherein the stationary member of the hydraulic portion of the intensifier is the hydraulic, cylinder, the bottom member or base 16 of the stool 12 is provided with a central bearing 17 through which the hydraulic cylinder 18 is passed from beneath and against the lower end of which bearing abuts an external shoulder 19 formed on the cylinder 18 toward its open lower end; while a nut 20 screwing on a threaded portion of the cylinder 18 engages the upper end of the bearing 17 so as to sustain the weight of the cylinder. The cylinder 18 extends upward above the nut'QO to near the bottom cover 1 1 of the steam cylinder but without coming in contact with the latter or with any part of the stool; and as the side walls of the stool 12 are apertured as at 21, 22 to permit free circulation of air through the space within: 'the stool, very little heat is able to reach the cylinder 18 by conduction through the stool from the steam largement 23 from which extends laterally a passage 24; leadin to the hydraulic main pressure pipe 25. elow the enlargement 23,

occupying its lowest position) is coupled to a crosshead 29 on the lower end of'the hydraulic ram 27 by means of pair of side rods 30 which pass through stuiiing boxes at 31 in the bottom cover l t of the steam cylinder 11 and extend on opposite sides of and parallel tothe common vertical axis of the cylinders 11 and 18, these stuffing boxes being preferably provided with steam packing of the floating metallic type not shown) adapted to yield to lateral strains due to any slight deviation from parallelism between the respectiverods 30. ilhereds 30 are also guided by passing through renewable bushes 32 held in sockets provided in the base 16 of the stool 12 alongside of the bearing 17, so that any shake which may tend to arise in these relatively long and slender rods (particularly when put suddenly under longi tudinal stress) be prevented as far as possible from affecting the various packings. The bushes 32 have the additional function of conducting heat away from the rods 30 and to the stool l2, and thereby'protect thehydraulic ram from access of an undue amount of heat. In order to take full advantage of this function of the bushes 32, it will; be observed that the portions of the rods 30 which are exposed to the direct action of the steam in the cylinder ll never pass below the bushes 32, and therefore, shown in Fig. 1, are neverindirect communication with the hydraulic mm. In other words,the height of the stool 12 is substantially equal to the stroke of the piston which works inthe cylinder 11.

This arrangement of the iarts whereby the hydraulic ram is protected from direct communication with the heated portions of the rods 30 is particularly important in the form of device shown 111' F 1g. 1, since the construction shown in Fig. 2 causes the packing of the hydraulic ram to move down-ward with'the movable ram member so that this packing always remains near the ends of the rods 30, The larger quantity of heat carried out of the cylinder 11 by the rods 30 is still short-circuitedaway by the bushes 32 to the stoohwhile any heat carried down into the Pit by the-rods rises upwardly and does not come into contact with the packing, which is then near the bottom of the pit. The pit,

therefore, operates as a chimney to direct cold air upon the hydraulic ram and itsassoci'ated parts. i a

In the form of apparatus illustrated in Figs. 3 and 4, wherein they stationary memher of the hydraulic portion of the intensifier'is the hydraulic ram, the bottom member or base 16 of the stool 12 has an upward extension 33 of reentrant conical shape, at the summit of which is acentral bearing 34 through "which an axial extension 35 of the upper end of the ram '36 is passed from beneath and against the lower end of which abuts a shoulder 37 provided on the ram, while a nut 38 screwing on the threaded upper end of the extension 35 engages the upper end ofthe bearing 34: so as to sustain the weight of the ram. All parts'ofthe ram 36 are thus kept at a considerable distance from the steam cylinder 11, and, as the side walls of the stool 12 are apertured as at'2l, 22 to permit fre e circulation of airthrough the space within the stool, very little heat is able to reach theram 36 from the steam cylinder 11.' The ram 36 is tubular, its lower end being open to the interior of the hydraulic cylinder 39 while its closed upper endhas a lateral passage 40 communicating withthe hydrauhcmam pressure pipe ll which 18 connected to-the rain immediately beneath nowable bushes 32 held in sockets provided in the cone alongside of the bearing 34-. The upper end of the cylinder 39 has a hydraulic stui'ling box 43 giving passage to the ram 36. I 7

What I claim is 2 7 a 1. In. a steam hydraulic intensifier, the combination of a foundation, a stool supported on the foundation, asteam cylinder supported on the stool, said stool comprising an integral open framework whereof the top member forms a bottom cover of the steam cylinder, a ram having one ram member secured within a part of the stool separated from the bottom cover of the. steam cylinder, a piston fitted towork in the steam cylinder, a cross head secured to move with the other ram member, members disposed alongside of and parallel to the vertical axis of the intensifier and connected to said cross head and to said piston, said stool forming an open frame freely exposed to the atmosphere and separating thev steam cylinder from'the ram and means for conducting heat from the said members and away from integral open frame whereof the top member forms the bottom cover of the steam cylinder and the bottom member forms the support for the ram and separates it from the top member of the stool, a piston fitted to work in the steam cylinder, a cross head on the movable member of the ram, rods disposed alongside of and parallel to the vertical axis of the cylinder and attached at their opposite ends to the steam piston and to said cross head of the ram member, stuffing boxes giving passage to said rods through the bottom cover of the steam cylinder, a stulling box giving passage through the open end of the hydraulic ram cylinder and bushings surrounding said rods and adapted to conduct heat from the said rods to the said stool, whereby the said ram is protected from undue access of heat.

3. in a steam hydraulic intensifier, the combination of a foundation, a stool supported on the foundation, a steam cylinder supported on the stool, and a ram supported on the stool, said stool comprising an integral open framework whereof the top member forms the bottom cover for the steam cylinder and the bottom member forms the support for the hydraulic ram member separated. from said top member of the stool, a piston fitted to work in the steam cylinder, and a cross head on the moving member of the ram, said openwork stool having heat-conducting bushings on each side of its central axis, and rods disposed alongside of and parallel to said central axis and attached at their opposite ends to the steam piston and to said cross head of the ram member and passing through the said guides of the integral open stool.

l. In a steam hydraulic intensifier, the (aunbination of a foundation, a stool supported on the foundation, a steam cylinder supported on the stool and a ram cylinder supported on the stool, said stool comprising an integral open framework whereof the top member forms the bottom cover for the steam cylinder, and the bottom mei ber forms the support for the hydraulic cylinder, a piston fitted to work in the steam cylinder, a ram plunger entering from below and adapted to work in the hydraulic cylinder, said ram plunger having across head, rods disposed alongside of and parallel to the vertical axis of the steam cylinder and attached at opposite ends to the steam piston and thecross head of the ram plunger and means for conducting heat from said rods to said stool and away from said ram.

5. in a steam hydraulic intensifier, the combination of a foundation, a stool supported on said foundation, a steam cylinder supported on said stool and a ram cylinder supported on said stool, the stool comprising an open framework whereof the top member forms the bottom cover of the steam cylinder and the bottom member forms the support for the ram cylinder, said ram cylinder being seated upwardly in the central passage of the bottom portion of the stool and having shoulders engaging said bottom portion of the stool, and a nut screwed from above onto the ram cylinder, a steam piston fitted to work in a steam cylinder, rods disposed alongside of and parallel to the vertical axis of the intensifier and attached at their 0pposite ends to the steam piston and to the cross head of the plunger member of the ram and means for conducting heat from said rods to said stool and away from said ram.

6. In a steam hydraulic intensifier, the combination of a steam motor, a hydraulic ram, means for connecting the movable portions of the said motor and ram to move simultaneously and means for conducting heat from the said connecting means and away from the said ram.

7. ln a steam hydraulic intensifier, the UOZUlJlIlEIlJlOll of a steam motor, a hydraulic ram, rods connecting the movable portions of the said motor and ram to move simultaneously and heat-conducting members surrounding the said rods and adapted to conduct heat from the lid rods and away from the said ram.

8. In a steam hydraulic intensifier, the combination of a foundation, a stool supported thereon, a steam motor supported on.

the said stool, a hydraulic ram also supported on the said stool, rods connecting the movable members of the said steam motor and of the said ram, andmeans for preventing access of heat from the said steam motor to the said ram, the said means comprising bushings mounted in the said stool and surrounding the said rods.

In testimony whereof I have hereto set my hand the ith day of July 1917.

TllOlllAS lVlLTON l-IAND.

ll itnesses J. KELLER, lnmvn F. Gnrnn. 

